AI agents call get_on_this_day to retrieve information from Wikimedia without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves historical information from Wikimedia without any capability to modify, delete, or execute operations. It has no side effects beyond data retrieval. The parameters allow filtering of results but do not enable any write or destructive actions. This is a straightforward read-only data retrieval operation with minimal security risk.
From the tool's definition Tool retrieves historical events data from Wikimedia for a given date. Description uses 'Get' and 'retrieve' language, with parameters for filtering type and project. No modification, deletion, or execution capability described.
Attacks that exploit this kind of access
Get historical events from Wikimedia for a date. Parameters: date (MM/DD, default today), type (all/selected/births/deaths/holidays/events), project (. It is categorised as a Read tool in the Wikimedia MCP Server, which means it retrieves data without modifying state.
Register the Wikimedia MCP server in PolicyLayer and add a rule for get_on_this_day: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Wikimedia. Nothing to install.
get_on_this_day is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_on_this_day rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_on_this_day. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_on_this_day is provided by the Wikimedia MCP server (rapidmcp/wikimedia). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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